Pivot fan



FIG. 1 is a front elevational view of a pivot fan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof; the left side being a mirror image thereof; and,

FIG. 4 is an enlarged top plan view thereof.

The bottom of the design is flat and unornamented. 

The ornamental design for a pivot fan, as shown and described. 